h1 {
    width: 400px;
    height: 100px;
    padding: 50px;
    margin: 50px;
    border: 1px solid red;
}
span {
    width: 400px;
    height: 100px;
    padding: 10px;
    margin: 10px;
    border: 1px solid #00dddd;
}
/*div {
    display: inline;
}
a {
    display: block;
    width: 100px;
    height: 100px; 
} */
a {
    display: inline-block;
    width: 200px;
    height: 100px;
    border: 1px solid skyblue;
}
a:hover {
    background-color: #0000cc;
}
div.box_before {
    width: 350PX;
    height: 50PX;
    background-color: blue;
}
div.box {
    /* box-sizing: border-box; */
    width: 350px;
    height: 150px;
    margin: 25px;
    padding: 25px;
    border: 5px solid black;
}
div.box_after {
    width: 350px;
    height: 50px;
    background-color: blue;
}

div.box_outline {
    width: 500px;
    height: 300px;
    border: 2px solid blue;
}
div.box_size {
    width: 50%;
    min-width: 300px;
    height: auto;
    background-color: crimson;
}
div.box_margin1 {
    width: 300px;
    height: 100px;
    margin: 10px 10px 5px 5px;
    /* margin: 20px; 
    margin-top: 50px;
    margin-left: 28px;
    margin: 0 auto;*/
    margin-bottom: 50px;
   background-color: orange; 
}
div.box_margin2 {
    width: 300px;
    height: 100px;
    margin-top: 35px;
    background-color: darkcyan;
}
div.box_outline p{
    margin-left: 30px;
    width: 100px;
    height: 30px;
    border-left: 3px solid red;
    border-top: 1px solid red;
    border-right: 1px solid red;
    border-bottom: 1px solid red;
    /* padding-top: 5px; */
    padding: 5px 0 0 5px;
}